<template>
    <div class="login-container">
        <!-- 登录表单 -->
        <!-- model收集数据，rules验证规则 -->
        <el-form
            ref="loginForm"
            :model="loginForm"
            :rules="loginRules"
            class="login-form"
            auto-complete="on"
            label-position="left"
        >
            <div class="title-container">
                <h3 class="title">登录</h3>
            </div>

            <el-form-item prop="username">
                <span class="svg-container">
                    <svg-icon icon-class="user" />
                </span>
                <el-input
                    ref="username"
                    v-model="loginForm.username"
                    placeholder="Username"
                    name="username"
                    type="text"
                    tabindex="1"
                    auto-complete="on"
                />
            </el-form-item>

            <el-form-item prop="password">
                <span class="svg-container">
                    <svg-icon icon-class="password" />
                </span>
                <el-input
                    :key="passwordType"
                    ref="password"
                    v-model="loginForm.password"
                    :type="passwordType"
                    placeholder="Password"
                    name="password"
                    tabindex="2"
                    auto-complete="on"
                    @keyup.enter.native="handleLogin"
                />
                <span class="show-pwd" @click="showPwd">
                    <svg-icon
                        :icon-class="
                            passwordType === 'password' ? 'eye' : 'eye-open'
                        "
                    />
                </span>
            </el-form-item>

            <el-button
                :loading="loading"
                type="primary"
                style="width: 100%; margin-bottom: 30px"
                @click.native.prevent="handleLogin"
                >登录</el-button
            >
            <el-button
                style="width: 100%; margin-bottom: 30px; margin-left: 0px"
                @click="loginOut"
                >退出</el-button
            >

            <div class="tips">
                <span style="margin-right: 20px">username: admin</span>
                <span> password: any</span>
            </div>
        </el-form>
    </div>
</template>

<script>

export default {
    name: 'Backstage',
    data() {
        // 这里进行表单验证，用户名密码的操作
        const validateUsername = (rule, value, callback) => {
            if (!validUsername(value)) {
                callback(new Error('Please enter the correct user name'))
            } else {
                callback()
            }
        }
        const validatePassword = (rule, value, callback) => {
            if (value.length < 6) {
                callback(new Error('The password can not be less than 6 digits'))
            } else {
                callback()
            }
        }
        return {
            loginForm: {
                username: 'admin',
                password: '111111'
            },
            loginRules: {
                username: [{ required: true, trigger: 'blur', validator: validateUsername }],
                password: [{ required: true, trigger: 'blur', validator: validatePassword }]
            },
            loading: false,
            passwordType: 'password',
            redirect: undefined
        }
    },
    watch: {
        $route: {
            handler: function (route) {
                this.redirect = route.query && route.query.redirect
            },
            immediate: true
        }
    },
    methods: {
        showPwd() {
            if (this.passwordType === 'password') {
                this.passwordType = ''
            } else {
                this.passwordType = 'password'
            }
            this.$nextTick(() => {
                this.$refs.password.focus()
            })
        },
        // 发送登录请求，把用户名和密码给服务器
        handleLogin() {
            this.$router.push({
                name: 'bHome'
            })
            // 这里验证用户名和密码
            // this.$refs.loginForm.validate(valid => {
            //   // 符合的话
            //   if (valid) {
            //     // 按钮有加载效果
            //     this.loading = true
            //     // 派发一个action带着用户名和密码
            //     this.$store.dispatch('user/login', this.loginForm).then(() => {
            //       // 登录成功后路由跳转
            //       this.$router.push({ path: this.redirect || '/' })
            //       // 关闭loding状态
            //       this.loading = false
            //     }).catch(() => {
            //       this.loading = false
            //     })
            //   } else {
            //     console.log('error submit!!')
            //     return false
            //   }
            // })
        },
        // 退出功能
        loginOut() {
            console.log('退出了')
            this.$router.push('/')
        }
        // 提示弹窗
        // msgFn(){
        //   this.$message({
        //     message:text,
        //     type:type
        //   })
        // }
    }
}
</script>

<style lang="less">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

@bg: #283443;
@light_gray: #fff;
@cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: @cursor)) {
    .login-container .el-input input {
        color: #fff;
    }
}

/* reset element-ui css */
.login-container {
    height: 100vh;
    .el-input {
        display: inline-block;
        height: 47px;
        width: 85%;

        input {
            background: transparent;
            border: 0px;
            -webkit-appearance: none;
            border-radius: 0px;
            padding: 12px 5px 12px 15px;
            color: @light_gray;
            height: 47px;
            caret-color: @cursor;

            &:-webkit-autofill {
                box-shadow: 0 0 0px 1000px @bg inset !important;
                -webkit-text-fill-color: @cursor !important;
            }
        }
    }

    .el-form-item {
        border: 1px solid rgba(255, 255, 255, 0.1);
        background: rgba(0, 0, 0, 0.1);
        border-radius: 5px;
        color: #454545;
    }
}
</style>

<style lang="less" scoped>
// @bg:#2d3a4b;
// $dark_gray:#889aa4;
// @light_gray:#eee;

.login-container {
    min-height: 100%;
    width: 100%;
    // background-color: @bg;
    background: url(~@/assets/bg.png) no-repeat;
    background-size: 100% 100%;
    overflow: hidden;
    // 手机端的背景
    @media only screen and (max-width: 500px) {
        background: url(~@/assets/bg-phone.jpg) no-repeat;
        background-size: 100% 100%;
    }

    .login-form {
        position: relative;
        width: 520px;
        max-width: 100%;
        padding: 160px 35px 0;
        margin: 0 auto;
        overflow: hidden;
    }

    .tips {
        font-size: 14px;
        color: #fff;
        margin-bottom: 10px;

        span {
            &:first-of-type {
                margin-right: 16px;
            }
        }
    }

    .svg-container {
        padding: 6px 5px 6px 15px;
        color: #889aa4;
        vertical-align: middle;
        width: 30px;
        display: inline-block;
    }

    .title-container {
        position: relative;

        .title {
            font-size: 26px;
            color: #eee;
            margin: 0px auto 40px auto;
            text-align: center;
            font-weight: bold;
        }
    }

    .show-pwd {
        position: absolute;
        right: 10px;
        top: 7px;
        font-size: 16px;
        color: #889aa4;
        cursor: pointer;
        user-select: none;
    }
}
</style>
